---
kind: "section"
citation: "49 C.F.R. § 172.325"
title: "49"
number: "172.325"
heading: "Elevated temperature materials."
url: "https://uscodex.org/cfr/49/172.325"
---

# §172.325. Elevated temperature materials.

- (a) Except as provided in [paragraph (b)](#b) of this section, a bulk packaging containing an elevated temperature material must be marked on two opposing sides with the word “HOT” in black or white Gothic lettering on a contrasting background. The marking must be displayed on the packaging itself or in black lettering on a plain white square-on-point configuration having the same outside dimensions as a placard. (See [§ 172.302(b)](/cfr/49/172.302.md?p=b) for size of markings on bulk packagings.)
- (b) Bulk packagings containing molten aluminum or molten sulfur must be marked “MOLTEN ALUMINUM” or “MOLTEN SULFUR”, respectively, in the same manner as prescribed in [paragraph (a)](#a) of this section.
- (c) If the identification number is displayed on a white-square-on-point display configuration, as prescribed in [§ 172.336(b)](/cfr/49/172.336.md?p=b), the word “HOT” may be displayed in the upper corner of the same white-square-on-point display configuration. The word “HOT” must be in black letters having a height of at least 50 mm (2.0 inches). Except for size, these markings shall be as illustrated for an Elevated temperature material, liquid, n.o.s.:

## Notes

### Amendments

[Amdt. 172-125, 58 FR 3348, Jan. 8, 1993, as amended by Amdt. 172-139, 59 FR 67487, Dec. 29, 1994]

### Authority

Authority: 49 U.S.C. 5101-5128, 44701; 49 CFR 1.81, 1.96 and 1.97.

### Source

Source: Amdt. 172-29, 41 FR 15996, Apr. 15, 1976, unless otherwise noted.

### Amendments

[Amdt. 172-125, 58 FR 3348, Jan. 8, 1993, as amended by Amdt. 172-139, 59 FR 67487, Dec. 29, 1994]